[1fa2099] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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| 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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| 4 | <!ENTITY % general-entities SYSTEM "../general.ent">
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| 5 | %general-entities;
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| 6 | ]>
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| 7 |
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[ede49cd] | 8 | <sect1 id="ch-materials-introduction">
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[1fa2099] | 9 | <?dbhtml filename="introduction.html"?>
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| 10 |
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| 11 | <title>Introduction</title>
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| 12 |
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| 13 | <para>This chapter includes a list of packages that need to be downloaded in
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| 14 | order to build a basic Linux system. The listed version numbers correspond to
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| 15 | versions of the software that are known to work, and this book is based on
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| 16 | their use. We highly recommend against using newer versions because the build
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| 17 | commands for one version may not work with a newer version. The newest package
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| 18 | versions may also have problems that require work-arounds. These work-arounds
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| 19 | will be developed and stabilized in the development version of the
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| 20 | book.</para>
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| 21 |
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| 22 | <para>Download locations may not always be accessible. If a download
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| 23 | location has changed since this book was published, Google (<ulink
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| 24 | url="http://www.google.com/"/>) provides a useful search engine for
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| 25 | most packages. If this search is unsuccessful, try one of the
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| 26 | alternative means of downloading discussed at <ulink
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| 27 | url="&lfs-root;lfs/packages.html#packages"/>. </para>
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| 28 |
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| 29 | <para>Downloaded packages and patches will need to be stored somewhere
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| 30 | that is conveniently available throughout the entire build. A working
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| 31 | directory is also required to unpack the sources and build them.
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| 32 | <filename class="directory">$LFS/sources</filename> can be used both
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| 33 | as the place to store the tarballs and patches and as a working
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| 34 | directory. By using this directory, the required elements will be
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| 35 | located on the LFS partition and will be available during all stages
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| 36 | of the building process.</para>
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| 37 |
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| 38 | <para>To create this directory, execute the following command, as user
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| 39 | <systemitem class="username">root</systemitem>, before starting the download
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| 40 | session:</para>
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| 41 |
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| 42 | <screen role="nodump"><userinput>mkdir -v $LFS/sources</userinput></screen>
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| 43 |
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| 44 | <para>Make this directory writable and sticky. <quote>Sticky</quote>
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| 45 | means that even if multiple users have write permission on a
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| 46 | directory, only the owner of a file can delete the file within a
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| 47 | sticky directory. The following command will enable the write and
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| 48 | sticky modes:</para>
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| 49 |
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| 50 | <screen role="nodump"><userinput>chmod -v a+wt $LFS/sources</userinput></screen>
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| 51 |
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[37e35d2] | 52 | <para>There are several ways to optain all the necessary packages and patches
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| 53 | to build LFS:</para>
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| 54 |
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| 55 | <itemizedlist>
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| 56 | <listitem>
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| 57 | <para>The files can be downloaded individually as described in the
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| 58 | next two sections.</para>
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| 59 | </listitem>
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| 60 | <listitem>
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| 61 | <para>For stable versions of the book, a tarball of all the needed files
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| 62 | can be downloaded from one of the LFS files mirrors listed at
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| 63 | <ulink url="http://www.linuxfromscratch.org/mirrors.html#files"/>.</para>
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| 64 | </listitem>
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| 65 | <listitem>
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| 66 | <para>The files can be downloaded using <command>wget</command> and
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| 67 | a wget-list as described below.</para>
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| 68 | </listitem>
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| 69 | </itemizedlist>
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| 70 |
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| 71 | <para>To download all of the packages and patches by using
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| 72 | <ulink url="../wget-list">wget-list</ulink> as an input to the
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| 73 | <command>wget</command> command, use:</para>
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[1fa2099] | 74 |
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| 75 | <screen role="nodump"><userinput>wget --input-file=wget-list --continue --directory-prefix=$LFS/sources</userinput></screen>
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| 76 |
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| 77 | <para>Additionally, starting with LFS-7.0, there is a separate file,
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| 78 | <ulink url="../md5sums">md5sums</ulink>, which can be used to verify that all
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| 79 | the correct packages are available before proceeding. Place that file in
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| 80 | <filename class="directory">$LFS/sources</filename> and run:</para>
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| 81 |
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| 82 | <screen role="nodump"><userinput>pushd $LFS/sources
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[37e35d2] | 83 | md5sum -c md5sums
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[1fa2099] | 84 | popd</userinput></screen>
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| 85 |
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[37e35d2] | 86 | <para>This check can be used after retrieving the needed files with any of the
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| 87 | methods listed above.</para>
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| 88 |
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[1fa2099] | 89 | </sect1>
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